| 摘要 |
<p>PURPOSE:To separate a normal input from disturbance even if the disturbance such as vibration is applied from the external to an operating input board and to improve an SN ratio by providing the titled device with a dummy input board. CONSTITUTION:In addition to pressure sensors S1-S4 interlocking with the operating input board 11, sensors S1'-S4' for detecting the direction and quantity of force applied to the dummy input board 12 formed so as to have the same mass as that of the input board 11 and to slightly move on a face parallel with the input board 11 are also arranged. When the input board 11 is depressed under no vibrated state, the outputs of the sensors S1-S4 are changed in accordance with the degree of inclination of the input board 11 and vectors are inputted. When vibration exists, the vibration is superposed to a depressing vector, so that its SN ratio is deteriorated and an output may be generated even in the case of no input. Thereby, a difference between the outputs of the sensors S1'-S4' of the dummy input board 12 and the outputs of the sensors S1-S4 of the input board 11 is calculated. Consequently, the influence of the disturbance can be removed and the SN ratio can be improved.</p> |
